. —- time will tell if they have any accuracy. 

The accuracy of that number depends on 8 full years of No More Cash out of Pocket. 

If he/she says all that you mentioned, I would be very concerned about the accuracy of anything else he/she said.Try Rentometer to find rental comps. 

As money allows, you'll upgrade to a sniper rifle for better accuracy or a machine gun to engage many targets at once.

How should I get a better idea of the accuracy of it?

Flo by MoenPhyn If anyone has experience using such devices, including how long they last and accuracy, I would love to know. 

Skilled REI should be within 5% accuracy of ARV.

By submitting a report from QB you are impliedly guaranteeing its accuracy.  

To meet this need in my company, we actually went through the licensing process to gain access to several skip tracing tools, and I have about 6 accounts that I use to generate extremely accurate phone numbers (94% accuracy rate).

They are always out there, but they will never just fall into your lap, they must be actively found.If you find a good deal (relative to the current market) then buy it without too much worry about the market cycle, which are impossible to predict in the short term with any sort of accuracy as to when, where, and how much things may dip.